Die-stamp.



E. D. N. SGHULTE.

I DIE STAMP.

APPLICATION FILED mm 25, 1910.

I I YI 12 5 8 16 '"m v .1 13 cufll 12170 mm a 6 INVENTOR I v I MEX-1x QMKKHM,

W ESSES Patented May 7, 1912-.

UNITED STATES PATENT OFFICE.

EDWARD n. N. scHULTn; 0F TROY, NEW YORK, ASSIGNOR T0 w. a L. E. GURLEY, A

CORPORATION or NEW YORK.

DIE-STAMP.

Specification of Letters Patent.

Patented May '7, 1912.

To all whom it may 00n0ern:

Be it known that I, EDWARD D. N. SOHULTE, a citizen of the United States, residing at Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Die- Stamps, of which the following is a specification.

This invention relates to dies or stamps and particularly to a device of this character designed to be readily portable and capable of giving clear and legible impressions without undue distortion of the metal stamped.

Sealers of weights and measures will find my invention particularly useful, in that it obviates the use of an anvil and does not tend to warp or distort the sheet metal of the measure which tends to change the capacity. Also the stamp proper may be removed from the device and be used as an ordinary hand stamp,-where this is required.

I will describe a preferred embodiment of the invention in connection with the accompanying drawings, in which Figure 1 is a side elevation of the complete device a part of the frame being broken away to show the working parts; Fig. 2 is a section on the line bb of Fig. 1; Fig. 3 is a section on line 0-0 of Fig. 1; Fig. 4: is a section on line dcZ of Fig. 2; Fig. 5 is a perspective view of the die and die-carrying plunger together with the plunger clamp spring and retaining ring; and Fig. 6 shows the impression made by the die.

The device consists of a frame or yoke casting 1, preferably of considerable weight. This casting 1 is shaped somewhat like the letter U, the space between the arms 2 and 3 being for the reception of the work to be stamped. It is provided with a heel portion 4: adapted to rest upon some support and a handle 5 to be grasped by the operator.

The lower arm 3 carries a matrix plate 6 preferably of moderately soft brass, held to the frame by screws 7 In the arm 2 opposite the matrix 6 is a vertical aperture consisting of a lower small cylindrical hole 8 and a larger upper threaded portion 9. A nut 10 is threaded into the portion 9 and has a longitudinal hole 11 alining with the hole 8. The nut 10 is also provided with an enlarged portion 12 whereby it may be turned by hand.

Guided in the holes 8 and 11 is the die carrier 13, the die 14 being formed on the end thereof. A keyway or slot 15 and a pin 16 in the frame engaging this slot constrain the die carrier to a straight up and down movement. The carrier is shouldered at 17 and a washer l8 bears against this shoulder. Between this washer 18 and the nut 10 a spring 19 is inserted, and thus by screwing down the nut 10 the die 14 is advanced and held against the work by spring pressure. A ring 20 is snapped into a groove 21 on the carrier so that the die may be retracted when the nut strikes this ring in the upward movement of the nut.

When the device is first assembled the die is struck into the soft matrix plate 6 so that in the subsequent use of the stamp the sheet metal to be marked will be embossed and not distorted or cut as when a die is used on sheet metal supported on a plane surface.

In using the stamp the metal to be marked is first placed in the matrix plate and the nut 10 is screwed down until the spring 19 is stressed so that the die 14-. is held tightly in contact with the metal. The operator then grasps the handle 5 and either holding the device in his hand or resting the heel 4 on some support strikes the upper end of the carrier 13 which projects above the nut 10, one or more blows with a hammer. The result is an impression such as is illustrated in Fig. 6. The spring 19 holds the die in proper register with the work and takes up the rebound. The die is thus accurately positioned and follows up the impression made, so that there is no danger of a double or blurred impression.

The particular advantages of the device are its comparative lightness, the avoidance of the need for an anvil, the accuracy of its work and the ease of operation, it being peculiarly diflicult to mark measures with a hand stamp on an anvil in the usual way. Obviously the die carriers and matrix plates may be easily changed.

Having thus described the invent-ion what I claim is 1. In a stamp the combination of a supporting frame; a matrix carried by the frame; a die movably mounted in the frame and coacting with the matrix; and means for bringing a yielding pressure on the die to urge it toward the matrix; the die being adapted also to be forced positively toward the matrix independently of the action of such yielding pressure means.

2. In a stamp the combination of a supporting frame; a matrix carried by the frame; a die movably mounted in the frame and coacting with the matrix; a spring engaging the die; and means for stressing said spring to cause it to urge the die toward the matrix, said die being arranged to be operated positively by impact independently of the action of the said spring while the spring is stressed.

3. In a stamp the combination of a frame provided with a handle and adapted to be rested upon a support; a matrix carried by the frame; a die mounted to move in the frame and coact with the matrix; a spring engaging the die; a nut threaded in the frame so as to be movable to stress the spring and thus urge the die toward the matrix, and a member movable with the die and adapted to be struck to force the die toward the matrix while the spring is stressed, but operating independently of the action of the spring.

4. In a stamp the combination of a substantially U-shaped rigid frame having a base adjacent the point of junction of the two arms thereof, adapted to rest upon a support; a handle carried by one of the arms of the frame; a matrix carried by the lower arm of the frame; a die mounted in the upper arm of the frame and adapted to coact with the matrix; and resilient means adapted to be brought into action to urge the die toward the matrix and thereby clamp material to be impressed by the die, said action being distinct from and independent of the operation of the die in the act of impressing the material so clamped.

5.. In a stamp, the combination of a substantially U-shaped frame, having a base adjacent the point of junction of the two arms of the frame, adapted to rest upon a support; a handle carried by one of the arms of the frame; a matrix carried by the lower arm; a die mounted in the upper arm and adapted to coact with the matrix; a spring engaging the die; and means for stressing said spring to urge the die toward the matrix, the die being adapted to be forced toward the matrix independently of the action of the spring while the latter is stressed.

6. In a stamp, the combination of a frame, provided with a face to support the surface to be imprinted or embossed; a nut threaded in the frame and adjustable toward and from the face aforesaid, said nut having an opening extending longitudinally therethrough; a die carrier mounted to move Fr within said opening and extending above and below the nut; and a spring interposed between the lower end of the nut and a projection on the carrier.

7, In a stamp, the combination of a frame, provided with a face to support the surface to be imprinted or embossed; a nut threaded in the frame and adjustable toward and from the face aforesaid, said nut having an opening extending longitudinally therethrough; a die carrier mounted to move within said opening and extending above and below the nut; a spring interposed between the lower end of the nut and a projection on the carrier; and means to prevent rotation of the carrier as it is moved up and down.

8. In a stamp, the combination of a frame, provided with a matrix to support the surface to be imprinted or embossed; a nut threaded in the frame and adjustable toward and from the matrix aforesaid, said nut having an opening extending longitudinally therethrough; a die carrier mounted to move within said opening and extending above and below the nut; a spring interposed between the lower end of the nut and a pro j ection on the carrier; and means to prevent rotation of the carrier as it is moved up and down.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWVARD D. N. SOI-IULTE.

Witnesses:

WILLIAM F. GURLEY, CHARLES G. EDDY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

